Sorry to hear you didn't have more luck but at least you got the 2 lil hatchlings, congrats. Sorry I missed the thread originally.
When I had corn eggs, I had put my male and female together in a tub for about 10 min when cleaning, so I wasn't expecting them, she laid them in her hide. I simply added moss all around it in the hide and left them in the cage with her. So the temps they had were my corn's tank temps (in a glass aquarium at that time). She had 9 eggs and 7 hatched. The two that didn't make it were the ones on the bottom, on/surrounded by the moss. I kept wetting the moss to try to keep the humidity up and when I opened the eggs it appeared the two babies had drowned in the eggs (they were plumper than the other eggs as well). So my thoughts, lookin at your photos, is the eggs may have gotten too much moisture from the substrate.
I wish you luck if you try again!